LambertMaterial

Configures the normal rendered appearance of Meshes using the non-realistic but GPU-efficient Lambertian flat shading model for calculating reflectance.

• Useful for efficiently rendering non-realistic objects for high-detail CAD.
• Use PhongMaterial when you need specular highlights.
• Use the physically-based MetallicMaterial or SpecularMaterial when you need more realism.
• For LambertMaterial, the illumination calculation is performed at each triangle vertex, and the resulting color is interpolated across the face of the triangle. For PhongMaterial, MetallicMaterial and SpecularMaterial, vertex normals are interpolated across the surface of the triangle, and the illumination calculation is performed at each texel.

Usage

[Run this example]

In the example below we'll create a Mesh with a shape defined by a buildTorusGeometry and normal rendering appearance configured with a LambertMaterial.

import {Viewer, Mesh, buildTorusGeometry, ReadableGeometry, LambertMaterial} from "xeokit-sdk.es.js";

const viewer = new Viewer({
    canvasId: "myCanvas"
});

viewer.scene.camera.eye = [0, 0, 5];
viewer.scene.camera.look = [0, 0, 0];
viewer.scene.camera.up = [0, 1, 0];

new Mesh(viewer.scene, {
     geometry: new ReadableGeometry(viewer.scene, buildTorusGeometry({
         center: [0, 0, 0],
         radius: 1.5,
         tube: 0.5,
         radialSegments: 12,
         tubeSegments: 8,
         arc: Math.PI * 2.0
     }),
     material: new LambertMaterial(viewer.scene, {
         ambient: [0.3, 0.3, 0.3],
         color: [0.5, 0.5, 0.0],
         alpha: 1.0, // Default
         lineWidth: 1,
         pointSize: 1,
         backfaces: false,
         frontFace: "ccw"
     })
 });

LambertMaterial Properties

The following table summarizes LambertMaterial properties: